OK, i'm about to replace my active pre-amp and pickups in my yamaha with a pair of EMG 45DC pickups and a tone knob. I want two volume controls instead of a blend, but the advantage of a single volume is the ability to turn up or down the bass with one turn. Is it unheard of to have 3 volume knobs, one master knob, and two knobs that individually control each pick up? I can see several advantages to this, and very few disadvantages. I already have 4 knobs on my bass, so the new setup would be Master volume neck volume bridge volume tone any comments?